Zara Phillips, the Queen's eldest granddaughter, is set to marry long-term boyfriend Mike Tindall after Buckingham Palace confirmed their engagement today (21st December 2010). England rugby star Tindall proposed to Ms Phillips at their Gloucestershire home yesterday, reports Sky News.Tindall, originally from Leeds, presented his wife-to-be with a solitaire diamond ring on a platinum band and Phillips said that she was both "shocked" and "very happy". The Queen and the Duke of Edinburgh were said to be "delighted" by the news. The engagement comes just weeks after Prince William and his long-term girlfriend Kate Middleton announced that they are to marry on April 29th 2011, however, it is not yet known whether Phillips and Tindall intend to marry next year also.The couple first met during England's successful World Cup rugby campaign in 2003, and Phillips won the BBC Sports Personality of the Year in 2007 after winning a gold medal at the World Equestrian Games in 2007. In a short statement, 32-year-old Tindall said, "I am delighted that Zara has agreed to marry me. We are both very excited about the next stage of our lives together".